Please help me answer this you just need to answer true or false

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d

What is the atomic number of an atom that has 6 protons

What is the compound name for the formula [ru(en)2cl2]2+ and [co(en)cl2br]-